Mental health problems disproportionately affect racial and ethnic minority populations, as well as populations that face chronic economic hardship. There is clear evidence that (1) the processes that lay the groundwork for mental health disparities is laid during childhood and (2) that damage to and dysregulation of the physiologic stress response is a powerful mechanism of the effects of chronic stress such as that associated with poverty on psychopathology. To contribute solutions to mental health disparities, interventions need to be capable of affecting the systems that confer the risk. Since the psychobiologic stress response system (e.g., hypothalamic-pituitary-adrenal axis; HPA) is a central mechanism linking health disparities to chronic stress, the stress response is a critical system to target. Improving children's ability to cope with stress and regulate their reactivity has the potential to break the cycle of damage, especially if the coping strategies and regulatory processes that we target have effects at the physiologic level. New evidence has emerged showing that different types of coping are evident at the level of the HPA—it is, therefore, time to evaluate whether a coping intervention designed for children facing chronic stress will both (a) improve children's ability to use primary and secondary control coping, and (b) have sustained effects at the physiologic level. The BaSICS intervention is designed to address core underlying mechanisms of risk and repair in the highly stressful context of poor, urban youths' lives.